Description
D136-001-007: Product Overview
The MOOG D136-001-007 is a two-stage electrohydraulic servo valve from the D136 Series, engineered for precision control of hydraulic actuators in dynamic systems requiring moderate flow rates and rapid response. In an automation architecture, it serves as the critical interface between electronic controllers (e.g., PLCs, motion controllers) and hydraulic actuators (e.g., cylinders, small motors), converting low-power electrical command signals into proportional hydraulic flow and pressure. The D136 Series balances compactness with performance, making it suitable for laboratory test rigs, small-scale industrial machinery, and simulation systems where space constraints coexist with accuracy demands. This valve operates on a nozzle-flapper pilot stage (for signal amplification) and a sliding spool main stage (for flow modulation), ensuring stable output across varying loads. The “001-007” configuration denotes a standard single-channel design, optimized for straightforward integration into single-actuator systems. It is typically deployed in closed-loop setups with position/force feedback, where adjustments to the input signal maintain desired actuator behavior—essential for avoiding overshoot in high-accuracy positioning tasks.
MOOG D136-001-007
D136-001-007: Technical Specifications
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Model Number: D136-001-007
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Manufacturer: Moog Inc.
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Product Type: Electrohydraulic Servo Valve (Two-Stage)
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Valve Configuration: 4-way spool (symmetrical flow paths, spring-centered), single-channel (001-007 configuration)
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Nominal Flow: 10 GPM (37.9 L/min) @ 1000 psi (69 bar) differential pressure
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Maximum Pressure: 3000 psi (207 bar) per port
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Input Signal: ±10VDC (standard), ±40mA (via optional G122 series amplifier)
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Response Time: <18 ms (step input to 90% flow)
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Resolution: <0.15% of full scale (hysteresis <0.6%)
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Operating Temperature: -20°C to +80°C (-4°F to 176°F) (fluid-dependent)
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Fluid Compatibility: Petroleum-based oils (ISO VG 32/46), HFC fluids (e.g., Houghto-Safe 620)
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Weight: 2.0 kg (4.4 lbs, valve body only)
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Dimensions: 140mm (L) x 76mm (W) x 102mm (H) (approximate)
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Certifications: CE, ISO 9001 (manufacturing standard)
Core Features & Customer Value
Moderate-Flow Precision Control: The two-stage design (nozzle-flapper pilot + sliding spool) delivers linear flow output proportional to the ±10VDC input, with resolution <0.15% of full scale. For engineers calibrating material testing machines, this ensures force application accuracy within ±0.5% of setpoints—critical for valid tensile/compression data.
Balanced Dynamic Response: A <18 ms response time allows rapid adjustment during transient conditions (e.g., cyclic loading in fatigue tests). In small hydraulic presses, this minimizes actuator lag, improving cycle time consistency by 10% compared to slower alternatives.
Compact, Rugged Construction: The valve body combines aluminum alloy (lightweight) with hardened spool lands (wear resistance), reducing weight by 25% versus cast-iron competitors. For maintenance teams, this simplifies handling during installation/repair in crowded control cabinets.
Simplified Maintenance: The two-stage design minimizes failure points (no complex pilot manifolds), and the spool/sleeve assembly is field-replaceable with basic tools. Annual maintenance time is reduced by 40% compared to multi-stage valves.
Seamless Integration: Native compatibility with Moog G122 amplifiers (for ±40mA signals) and standard analog controllers (PLCs, PID loops) enables plug-and-play setup. For procurement managers, this avoids costly custom interface development.
MOOG D136-001-007
Typical Applications
The D136-001-007 is deployed in systems prioritizing moderate flow, precision, and compactness:
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Material Testing: Universal testing machines (tension/compression control), fatigue test rigs (cyclic load application up to 10 Hz).
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Laboratory Equipment: Benchtop hydraulic trainers, fluid power demonstration systems.
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Small Industrial Machinery: Robotic part feeders (positioning accuracy ±0.1mm), small press brakes (bend angle control).
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Simulation Systems: Flight control surface simulators (small-scale actuators), vehicle suspension test rigs.
In a university materials lab, for example, the D136-001-007 controls a hydraulic cylinder in a fatigue test rig for aluminum alloys. Its <18 ms response ensures the cylinder follows a 3Hz sinusoidal load profile within ±0.05mm displacement error—enabling accurate measurement of crack propagation rates.
